document.write( "Question 960731: Rewrite the equation $\"+sin2x=cos%28x%29+\"$
\n" ); document.write( "using only cos(x) (and numbers). Then find all solutions to the equation.\r
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\n" ); document.write( "\n" ); document.write( "Thanks! \n" ); document.write( "

Algebra.Com's Answer #587158 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
Rewrite the equation $\"+sin2x=cos%28x%29+\"$
\n" ); document.write( "using only cos(x) (and numbers).
\n" ); document.write( "2sin*cos = cos
\n" ); document.write( " $\"2%2Asqrt%281-cos%5E2%28x%29%29%2Acos%28x%29+=+cos%28x%29\"$
\n" ); document.write( "==========================
\n" ); document.write( "Then find all solutions to the equation.
\n" ); document.write( "2sin*cos = cos
\n" ); document.write( "2sin*cos - cos = 0
\n" ); document.write( "cos(2sin - 1) = 0
\n" ); document.write( "cos = 0
\n" ); document.write( "x = pi + n*pi n = 0,1,2,3...
\n" ); document.write( "---------------
\n" ); document.write( "2sin - 1 = 0
\n" ); document.write( "sin(x) = 1/2
\n" ); document.write( "x = pi/6 + 2n*pi n = 0,1,2,3...
\n" ); document.write( "x = 5pi/6 + 2n*pi n = 0,1,2,3...
\n" ); document.write( " \n" ); document.write( "

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